In recent years, a rapidly expanding database, especially in sensitive high-resolution ion
microprobe (SHRIMP) geochronology, has led to significant advances in understanding of …

Recent zircon-based geochronological investigations in the Adirondack Mountains, in the
state of New York, demonstrate that 1155±6 Ma massif anorthosite was emplaced during the …

The low abundance of igneous zircon in Proterozoic massif anorthosites has presented a
major obstacle to the acquisition of direct absolute ages of crystallization for these important …

Recent investigations in geochronology and tectonics provide important new insights into
the evolution of the Grenville Orogen in North America. Here, we summarize results of this …

The two largest A-type granites of the Mesozoic White Mountain Batholith of New Hampshire
are the Mount Osceola and Conway granites. As is typical of anorogenic granites, the …

Zircon grains in granites from Avalonian and Ganderian rocks in southern New England host
brittle internal structures that are interpreted here to show the host rocks to be allochthonous …

Abstract Remnants of the Grenville Orogeny—a globally pervasive tectonothermal event
resulting from the amalgamation of the supercontinent Rodinia between ca. 1.3 and 1.0 Ga …

Gneiss domes are an integral element of many orogenic belts and commonly provide
tectonic windows into deep crustal levels. Gneiss domes in the New England segment of the …

U-Pb ages of detrital, metamorphic, and magmatic zircon and metamorphic monazite and
titanite provide evidence for the ages of deposition and metamorphism of metasedimentary …

Aseismic ridge subduction is common along modern convergent margins. We enumerate six
criteria that can be used to recognize aseismic ridge subduction in orogens, including a …